水生经济植物净化水质研究

Study on Water Purification with Economical Aquatic Plants

选用4种具有一定经济价值的水生植物水花生、水芹、茭白和荸荠处理微污染景观水。结果表明:在一定的范围内,随着水中NH3-N,P含量的增大,4种植物的去除率都有增大趋势;浊度的变化对其去除效果影响较小。不同植物去除高锰酸钾指数、凯氏氮、总磷的最佳pH值不同,但都有缓冲水体pH值的作用,其中以水芹的作用最大。光照时间、温度对水质有一定的净化作用。

In this experiment four plants with certain economical values such as water peanut, Chinese celery, wild rice stem, and water chestnut are chosen to treat landscape water slightly polluted. It shows： with the content of polutants, the removal rate of them improve; the change of turbidity affects its removal rate less. Each aquatic plant has different suitable pH value for remove of potassium permanganate index, kjeldahl nitrogen, total phosphorus, four plants all have abirritation to pH value. The wild rice stem has most strong function to reduce pH value. The other factors, such as the time of sunshine, the temperature have some effect on water purification.